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ruby--ruby/ext/openssl/ossl_pkey_rsa.c

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/*
* $Id$
* 'OpenSSL for Ruby' project
* Copyright (C) 2001-2002 Michal Rokos <m.rokos@sh.cvut.cz>
* All rights reserved.
*/
/*
* This program is licenced under the same licence as Ruby.
* (See the file 'LICENCE'.)
*/
#if !defined(OPENSSL_NO_RSA)
#include "ossl.h"
#define GetPKeyRSA(obj, pkey) do { \
GetPKey(obj, pkey); \
if (EVP_PKEY_type(pkey->type) != EVP_PKEY_RSA) { /* PARANOIA? */ \
ossl_raise(rb_eRuntimeError, "THIS IS NOT A RSA!") ; \
} \
} while (0)
#define RSA_HAS_PRIVATE(rsa) ((rsa)->p && (rsa)->q)
#define RSA_PRIVATE(obj,rsa) (RSA_HAS_PRIVATE(rsa)||OSSL_PKEY_IS_PRIVATE(obj))
/*
* Classes
*/
VALUE cRSA;
VALUE eRSAError;
/*
* Public
*/
static VALUE
rsa_instance(VALUE klass, RSA *rsa)
{
EVP_PKEY *pkey;
VALUE obj;
if (!rsa) {
return Qfalse;
}
if (!(pkey = EVP_PKEY_new())) {
return Qfalse;
}
if (!EVP_PKEY_assign_RSA(pkey, rsa)) {
EVP_PKEY_free(pkey);
return Qfalse;
}
WrapPKey(klass, obj, pkey);
return obj;
}
VALUE
ossl_rsa_new(EVP_PKEY *pkey)
{
VALUE obj;
if (!pkey) {
obj = rsa_instance(cRSA, RSA_new());
}
else {
if (EVP_PKEY_type(pkey->type) != EVP_PKEY_RSA) {
ossl_raise(rb_eTypeError, "Not a RSA key!");
}
WrapPKey(cRSA, obj, pkey);
}
if (obj == Qfalse) {
ossl_raise(eRSAError, NULL);
}
return obj;
}
/*
* Private
*/
static RSA *
rsa_generate(int size, int exp)
{
return RSA_generate_key(size, exp,
rb_block_given_p() ? ossl_generate_cb : NULL,
NULL);
}
/*
* call-seq:
* RSA.generate(size [, exponent]) -> rsa
*
* === Parameters
* * +size+ is an integer representing the desired key size. Keys smaller than 1024 should be considered insecure.
* * +exponent+ is an odd number normally 3, 17, or 65537.
*
*/
static VALUE
ossl_rsa_s_generate(int argc, VALUE *argv, VALUE klass)
{
/* why does this method exist? why can't initialize take an optional exponent? */
RSA *rsa;
VALUE size, exp;
VALUE obj;
rb_scan_args(argc, argv, "11", &size, &exp);
rsa = rsa_generate(NUM2INT(size), NIL_P(exp) ? RSA_F4 : NUM2INT(exp)); /* err handled by rsa_instance */
obj = rsa_instance(klass, rsa);
if (obj == Qfalse) {
RSA_free(rsa);
ossl_raise(eRSAError, NULL);
}
return obj;
}
/*
* call-seq:
* RSA.new([size | encoded_key] [, pass]) -> rsa
*
* === Parameters
* * +size+ is an integer representing the desired key size.
* * +encoded_key+ is a string containing PEM or DER encoded key.
* * +pass+ is an optional string with the password to decrypt the encoded key.
*
* === Examples
* * RSA.new(2048) -> rsa
* * RSA.new(File.read("rsa.pem")) -> rsa
* * RSA.new(File.read("rsa.pem"), "mypassword") -> rsa
*/
static VALUE
ossl_rsa_initialize(int argc, VALUE *argv, VALUE self)
{
EVP_PKEY *pkey;
RSA *rsa;
BIO *in;
char *passwd = NULL;
VALUE arg, pass;
GetPKey(self, pkey);
if(rb_scan_args(argc, argv, "02", &arg, &pass) == 0) {
rsa = RSA_new();
}
else if (FIXNUM_P(arg)) {
rsa = rsa_generate(FIX2INT(arg), NIL_P(pass) ? RSA_F4 : NUM2INT(pass));
if (!rsa) ossl_raise(eRSAError, NULL);
}
else {
if (!NIL_P(pass)) passwd = StringValuePtr(pass);
arg = ossl_to_der_if_possible(arg);
in = ossl_obj2bio(arg);
rsa = PEM_read_bio_RSAPrivateKey(in, NULL, ossl_pem_passwd_cb, passwd);
if (!rsa) {
BIO_reset(in);
rsa = PEM_read_bio_RSAPublicKey(in, NULL, NULL, NULL);
}
if (!rsa) {
BIO_reset(in);
rsa = PEM_read_bio_RSA_PUBKEY(in, NULL, NULL, NULL);
}
if (!rsa) {
BIO_reset(in);
rsa = d2i_RSAPrivateKey_bio(in, NULL);
}
if (!rsa) {
BIO_reset(in);
rsa = d2i_RSAPublicKey_bio(in, NULL);
}
if (!rsa) {
BIO_reset(in);
rsa = d2i_RSA_PUBKEY_bio(in, NULL);
}
BIO_free(in);
if (!rsa) ossl_raise(eRSAError, "Neither PUB key nor PRIV key:");
}
if (!EVP_PKEY_assign_RSA(pkey, rsa)) {
RSA_free(rsa);
ossl_raise(eRSAError, NULL);
}
return self;
}
/*
* call-seq:
* rsa.public? -> true
*
* The return value is always true since every private key is also a public key.
*
*/
static VALUE
ossl_rsa_is_public(VALUE self)
{
EVP_PKEY *pkey;
GetPKeyRSA(self, pkey);
/*
* This method should check for n and e. BUG.
*/
return Qtrue;
}
/*
* call-seq:
* rsa.private? -> true | false
*
*/
static VALUE
ossl_rsa_is_private(VALUE self)
{
EVP_PKEY *pkey;
GetPKeyRSA(self, pkey);
return (RSA_PRIVATE(self, pkey->pkey.rsa)) ? Qtrue : Qfalse;
}
/*
* call-seq:
* rsa.to_pem([cipher, pass]) -> aString
*
* === Parameters
* * +cipher+ is a Cipher object.
* * +pass+ is a string.
*
* === Examples
* * rsa.to_pem -> aString
* * rsa.to_pem(cipher, pass) -> aString
*/
static VALUE
ossl_rsa_export(int argc, VALUE *argv, VALUE self)
{
EVP_PKEY *pkey;
BIO *out;
const EVP_CIPHER *ciph = NULL;
char *passwd = NULL;
VALUE cipher, pass, str;
GetPKeyRSA(self, pkey);
rb_scan_args(argc, argv, "02", &cipher, &pass);
if (!NIL_P(cipher)) {
ciph = GetCipherPtr(cipher);
if (!NIL_P(pass)) {
passwd = StringValuePtr(pass);
}
}
if (!(out = BIO_new(BIO_s_mem()))) {
ossl_raise(eRSAError, NULL);
}
if (RSA_HAS_PRIVATE(pkey->pkey.rsa)) {
if (!PEM_write_bio_RSAPrivateKey(out, pkey->pkey.rsa, ciph,
NULL, 0, ossl_pem_passwd_cb, passwd)) {
BIO_free(out);
ossl_raise(eRSAError, NULL);
}
} else {
if (!PEM_write_bio_RSAPublicKey(out, pkey->pkey.rsa)) {
BIO_free(out);
ossl_raise(eRSAError, NULL);
}
}
str = ossl_membio2str(out);
return str;
}
/*
* call-seq:
* rsa.to_der -> aString
*
*/
static VALUE
ossl_rsa_to_der(VALUE self)
{
EVP_PKEY *pkey;
int (*i2d_func)_((const RSA*, unsigned char**));
unsigned char *p;
long len;
VALUE str;
GetPKeyRSA(self, pkey);
if(RSA_HAS_PRIVATE(pkey->pkey.rsa))
i2d_func = i2d_RSAPrivateKey;
else
i2d_func = i2d_RSAPublicKey;
if((len = i2d_func(pkey->pkey.rsa, NULL)) <= 0)
ossl_raise(eRSAError, NULL);
str = rb_str_new(0, len);
p = RSTRING_PTR(str);
if(i2d_func(pkey->pkey.rsa, &p) < 0)
ossl_raise(eRSAError, NULL);
ossl_str_adjust(str, p);
return str;
}
#define ossl_rsa_buf_size(pkey) (RSA_size((pkey)->pkey.rsa)+16)
/*
* call-seq:
* rsa.public_encrypt(string [, padding]) -> aString
*
*/
static VALUE
ossl_rsa_public_encrypt(int argc, VALUE *argv, VALUE self)
{
EVP_PKEY *pkey;
int buf_len, pad;
VALUE str, buffer, padding;
GetPKeyRSA(self, pkey);
rb_scan_args(argc, argv, "11", &buffer, &padding);
pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding);
StringValue(buffer);
str = rb_str_new(0, ossl_rsa_buf_size(pkey));
buf_len = RSA_public_encrypt(RSTRING_LEN(buffer), RSTRING_PTR(buffer),
RSTRING_PTR(str), pkey->pkey.rsa,
pad);
if (buf_len < 0) ossl_raise(eRSAError, NULL);
rb_str_set_len(str, buf_len);
return str;
}
/*
* call-seq:
* rsa.public_decrypt(string [, padding]) -> aString
*
*/
static VALUE
ossl_rsa_public_decrypt(int argc, VALUE *argv, VALUE self)
{
EVP_PKEY *pkey;
int buf_len, pad;
VALUE str, buffer, padding;
GetPKeyRSA(self, pkey);
rb_scan_args(argc, argv, "11", &buffer, &padding);
pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding);
StringValue(buffer);
str = rb_str_new(0, ossl_rsa_buf_size(pkey));
buf_len = RSA_public_decrypt(RSTRING_LEN(buffer), RSTRING_PTR(buffer),
RSTRING_PTR(str), pkey->pkey.rsa,
pad);
if (buf_len < 0) ossl_raise(eRSAError, NULL);
rb_str_set_len(str, buf_len);
return str;
}
/*
* call-seq:
* rsa.private_encrypt(string [, padding]) -> aString
*
*/
static VALUE
ossl_rsa_private_encrypt(int argc, VALUE *argv, VALUE self)
{
EVP_PKEY *pkey;
int buf_len, pad;
VALUE str, buffer, padding;
GetPKeyRSA(self, pkey);
if (!RSA_PRIVATE(self, pkey->pkey.rsa)) {
ossl_raise(eRSAError, "private key needed.");
}
rb_scan_args(argc, argv, "11", &buffer, &padding);
pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding);
StringValue(buffer);
str = rb_str_new(0, ossl_rsa_buf_size(pkey));
buf_len = RSA_private_encrypt(RSTRING_LEN(buffer), RSTRING_PTR(buffer),
RSTRING_PTR(str), pkey->pkey.rsa,
pad);
if (buf_len < 0) ossl_raise(eRSAError, NULL);
rb_str_set_len(str, buf_len);
return str;
}
/*
* call-seq:
* rsa.private_decrypt(string [, padding]) -> aString
*
*/
static VALUE
ossl_rsa_private_decrypt(int argc, VALUE *argv, VALUE self)
{
EVP_PKEY *pkey;
int buf_len, pad;
VALUE str, buffer, padding;
GetPKeyRSA(self, pkey);
if (!RSA_PRIVATE(self, pkey->pkey.rsa)) {
ossl_raise(eRSAError, "private key needed.");
}
rb_scan_args(argc, argv, "11", &buffer, &padding);
pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding);
StringValue(buffer);
str = rb_str_new(0, ossl_rsa_buf_size(pkey));
buf_len = RSA_private_decrypt(RSTRING_LEN(buffer), RSTRING_PTR(buffer),
RSTRING_PTR(str), pkey->pkey.rsa,
pad);
if (buf_len < 0) ossl_raise(eRSAError, NULL);
rb_str_set_len(str, buf_len);
return str;
}
/*
* call-seq:
* rsa.params -> hash
*
* Stores all parameters of key to the hash
* INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!!
* Don't use :-)) (I's up to you)
*/
static VALUE
ossl_rsa_get_params(VALUE self)
{
EVP_PKEY *pkey;
VALUE hash;
GetPKeyRSA(self, pkey);
hash = rb_hash_new();
rb_hash_aset(hash, rb_str_new2("n"), ossl_bn_new(pkey->pkey.rsa->n));
rb_hash_aset(hash, rb_str_new2("e"), ossl_bn_new(pkey->pkey.rsa->e));
rb_hash_aset(hash, rb_str_new2("d"), ossl_bn_new(pkey->pkey.rsa->d));
rb_hash_aset(hash, rb_str_new2("p"), ossl_bn_new(pkey->pkey.rsa->p));
rb_hash_aset(hash, rb_str_new2("q"), ossl_bn_new(pkey->pkey.rsa->q));
rb_hash_aset(hash, rb_str_new2("dmp1"), ossl_bn_new(pkey->pkey.rsa->dmp1));
rb_hash_aset(hash, rb_str_new2("dmq1"), ossl_bn_new(pkey->pkey.rsa->dmq1));
rb_hash_aset(hash, rb_str_new2("iqmp"), ossl_bn_new(pkey->pkey.rsa->iqmp));
return hash;
}
/*
* call-seq:
* rsa.to_text -> aString
*
* Prints all parameters of key to buffer
* INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!!
* Don't use :-)) (It's up to you)
*/
static VALUE
ossl_rsa_to_text(VALUE self)
{
EVP_PKEY *pkey;
BIO *out;
VALUE str;
GetPKeyRSA(self, pkey);
if (!(out = BIO_new(BIO_s_mem()))) {
ossl_raise(eRSAError, NULL);
}
if (!RSA_print(out, pkey->pkey.rsa, 0)) { /* offset = 0 */
BIO_free(out);
ossl_raise(eRSAError, NULL);
}
str = ossl_membio2str(out);
return str;
}
/*
* call-seq:
* rsa.public_key -> aRSA
*
* Makes new instance RSA PUBLIC_KEY from PRIVATE_KEY
*/
static VALUE
ossl_rsa_to_public_key(VALUE self)
{
EVP_PKEY *pkey;
RSA *rsa;
VALUE obj;
GetPKeyRSA(self, pkey);
/* err check performed by rsa_instance */
rsa = RSAPublicKey_dup(pkey->pkey.rsa);
obj = rsa_instance(CLASS_OF(self), rsa);
if (obj == Qfalse) {
RSA_free(rsa);
ossl_raise(eRSAError, NULL);
}
return obj;
}
/*
* TODO: Test me
static VALUE
ossl_rsa_blinding_on(VALUE self)
{
EVP_PKEY *pkey;
GetPKeyRSA(self, pkey);
if (RSA_blinding_on(pkey->pkey.rsa, ossl_bn_ctx) != 1) {
ossl_raise(eRSAError, NULL);
}
return self;
}
static VALUE
ossl_rsa_blinding_off(VALUE self)
{
EVP_PKEY *pkey;
GetPKeyRSA(self, pkey);
RSA_blinding_off(pkey->pkey.rsa);
return self;
}
*/
OSSL_PKEY_BN(rsa, n);
OSSL_PKEY_BN(rsa, e);
OSSL_PKEY_BN(rsa, d);
OSSL_PKEY_BN(rsa, p);
OSSL_PKEY_BN(rsa, q);
OSSL_PKEY_BN(rsa, dmp1);
OSSL_PKEY_BN(rsa, dmq1);
OSSL_PKEY_BN(rsa, iqmp);
/*
* INIT
*/
#define DefRSAConst(x) rb_define_const(cRSA, #x,INT2FIX(RSA_##x))
void
Init_ossl_rsa()
{
#if 0 /* let rdoc know about mOSSL and mPKey */
mOSSL = rb_define_module("OpenSSL");
mPKey = rb_define_module_under(mOSSL, "PKey");
#endif
eRSAError = rb_define_class_under(mPKey, "RSAError", ePKeyError);
cRSA = rb_define_class_under(mPKey, "RSA", cPKey);
rb_define_singleton_method(cRSA, "generate", ossl_rsa_s_generate, -1);
rb_define_method(cRSA, "initialize", ossl_rsa_initialize, -1);
rb_define_method(cRSA, "public?", ossl_rsa_is_public, 0);
rb_define_method(cRSA, "private?", ossl_rsa_is_private, 0);
rb_define_method(cRSA, "to_text", ossl_rsa_to_text, 0);
rb_define_method(cRSA, "export", ossl_rsa_export, -1);
rb_define_alias(cRSA, "to_pem", "export");
rb_define_alias(cRSA, "to_s", "export");
rb_define_method(cRSA, "to_der", ossl_rsa_to_der, 0);
rb_define_method(cRSA, "public_key", ossl_rsa_to_public_key, 0);
rb_define_method(cRSA, "public_encrypt", ossl_rsa_public_encrypt, -1);
rb_define_method(cRSA, "public_decrypt", ossl_rsa_public_decrypt, -1);
rb_define_method(cRSA, "private_encrypt", ossl_rsa_private_encrypt, -1);
rb_define_method(cRSA, "private_decrypt", ossl_rsa_private_decrypt, -1);
DEF_OSSL_PKEY_BN(cRSA, rsa, n);
DEF_OSSL_PKEY_BN(cRSA, rsa, e);
DEF_OSSL_PKEY_BN(cRSA, rsa, d);
DEF_OSSL_PKEY_BN(cRSA, rsa, p);
DEF_OSSL_PKEY_BN(cRSA, rsa, q);
DEF_OSSL_PKEY_BN(cRSA, rsa, dmp1);
DEF_OSSL_PKEY_BN(cRSA, rsa, dmq1);
DEF_OSSL_PKEY_BN(cRSA, rsa, iqmp);
rb_define_method(cRSA, "params", ossl_rsa_get_params, 0);
DefRSAConst(PKCS1_PADDING);
DefRSAConst(SSLV23_PADDING);
DefRSAConst(NO_PADDING);
DefRSAConst(PKCS1_OAEP_PADDING);
/*
* TODO: Test it
rb_define_method(cRSA, "blinding_on!", ossl_rsa_blinding_on, 0);
rb_define_method(cRSA, "blinding_off!", ossl_rsa_blinding_off, 0);
*/
}
#else /* defined NO_RSA */
# warning >>> OpenSSL is compiled without RSA support <<<
void
Init_ossl_rsa()
{
rb_warning("OpenSSL is compiled without RSA support");
}
#endif /* NO_RSA */
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